When I was performing I wouldn't spend too much time on programing. It would really depend on the keyboard I was using at the time. However, I really hated keyboard limitations and never used the internal sequencers on a performance. I felt they really held back performance potential. Mainly sound quality and DSP power. I would always use an external sequencer, so I could use the keyboards effects to their full potential within a performance. That's what's nice about the performance set ups on arrangers. each performance part could use the boards full potential as far as sound quality and its other features. With synths it was often a pain in the butt because you had 16 parts to the performance and those performance set ups were often limited because of the boards DSP limitations and othe things. They weren't really "snap shots" so to say like they were on arrangers. With arrangers when you pressed the performance you wanted the WHOLE keyboard reconfigured for that set up, but with synths you didn't really have that control....

Squeak